For instance, in normal, healthy mice, the agouti genes are kept in the "off" position by the epigenome, which attaches methyl groups to the corresponding regions of DNA, resulting in the DNA's ...

All cats are genetically tabbies thanks to the agouti gene. In many cats and cat breeds, the agouti gene is suppressed, giving them a solid color. When it comes through, however, the agouti gene ...